The first superhero I remember inventing was the Alpha Beast. I’m not sure how old I was. He was scientist named Brian Daniels who invented a machine that could de-evolve any living thing to an ancestral form. So, of course, he used the machine to transform himself into a superpowered reptile-simian. And then he fought crime. Because that’s what you do when you’re a genius who can transform himself into a completely non-existent ancestral form. He called himself the Alpha Beast because alpha=first. It surprises me that I knew that as a kid. I’m pretty sure I learned that from reading comics.
AB’s physical form was inspired by the monster Gog from Spider-Man #103. Brian Daniels had technology that prevented his brain from de-evolving with his body so he was both super strong and really smart.